I think Intel poaching a different company's CEO to lead them is a very unreasonable expectation unless they wish to tank even faster. Imagining Lisa Su would give up on AMD to lead Intel is just plain silly. It's hard to find a more fulfilling role in life when you're in such position than she has now, and it's about much more than money at that stage, unless you have reached CEO position solely through politics, not skill and commitment, and are insecure regarding your abilities. She is an engineering lead at heart and knows she wouldn't get the same fulfillment or respect for leading Intel. I think she's committed to AMD, unless she ever feels AMD stopped wanting her, which doesn't seem to be the case.
They are 90% likely to hire from within at Intel. Unless nobody's up to the task, then they will hire externally and fail further.
To succeed, Intel needs a technical manager from within to lead them, someone who truly understands the engineering work that they're capable of from within. It's a complex company with plenty of hidden talent, sinking while their core is sleeping on many opportunities. You need to know it inside out to turn it around. Their largest mistake was becoming a large excel sheet rather than a tech innovator.